Though he is busy, he is very _____ and makes a telephone call to his parents from time to time and tries his best to spare some time to visit them.

Rubbish _______ to produce electricity after this kind of new machine is invited. [ ]

Can you meinformation aboutthe student exchange program

78. After half a year’s practice he beganto himself____a worker in each aspect .

weather it is! We can’t go boating on the lake.— Don’t worry. Let’s go to the Science Museum instead.